Finding the Third Proportional to 27,390 and 42,292.50

Step by Step Solution

1. Step 1: Write the proportion equation
   27,390 : 42,292.50 = 42,292.50 : x
2. Step 2: Convert to fraction form
   27,390/42,292.50 = 42,292.50/x
3. Step 3: Cross multiply
   27,390x = 42,292.50 × 42,292.50
4. Step 4: Simplify right side
   27,390x = 1,788,655,556.25
5. Step 5: Solve for x
   x = 1,788,655,556.25/27,390
6. Step 6: Final answer
   x = 65,303.23